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Commit | Line | Data |
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1 | page 200\r | |
2 | \r | |
3 | ; Simple polling drivers for ASCI0 and ASCI1\r | |
4 | \r | |
5 | extrn ioiniml\r | |
6 | \r | |
7 | global as0init\r | |
8 | global as0ista,as0inp\r | |
9 | global as0osta,as0out\r | |
10 | global as1init\r | |
11 | global as1ista,as1inp\r | |
12 | global as1osta,as1out\r | |
13 | \r | |
14 | include config.inc\r | |
15 | include z180reg.inc\r | |
16 | \r | |
17 | \r | |
18 | ;--------------------------------------------------------------\r | |
19 | ;\r | |
20 | ;\r | |
21 | ; TC = (f PHI /(2*baudrate*Clock_mode)) - 2\r | |
22 | ;\r | |
23 | ; TC = (f PHI / (32 * baudrate)) - 2\r | |
24 | ;\r | |
25 | \r | |
26 | cseg\r | |
27 | ;\r | |
28 | ; Init Serial I/O for console input and output (ASCI1)\r | |
29 | ;\r | |
30 | \r | |
31 | ; TODO: set baudrate\r | |
32 | \r | |
33 | as0init:\r | |
34 | ld hl,initab0\r | |
35 | jp ioiniml\r | |
36 | \r | |
37 | as1init:\r | |
38 | ld hl,initab1\r | |
39 | jp ioiniml\r | |
40 | \r | |
41 | \r | |
42 | \r | |
43 | \r | |
44 | initab0:\r | |
45 | db 1,stat0,0 ;Disable rx/tx interrupts\r | |
46 | ;Enable baud rate generator\r | |
47 | db 1,asext0,M_BRGMOD+M_DCD0DIS+M_CTS0DIS\r | |
48 | db 2,astc0l,low 28, high 28\r | |
49 | db 1,cntlb0,M_MPBT ;No MP Mode, X16\r | |
50 | db 1,cntla0,M_RE+M_TE+M_MOD2 ;Rx/Tx enable, 8N1\r | |
51 | db 0\r | |
52 | \r | |
53 | initab1:\r | |
54 | db 1,stat1,0 ;Disable rx/tx ints, disable CTS1\r | |
55 | db 1,asext1,M_BRGMOD ;Enable baud rate generator\r | |
56 | db 2,astc1l,low 3, high 3\r | |
57 | db 1,cntlb1,M_MPBT ;No MP Mode, X16\r | |
58 | db 1,cntla1,M_RE+M_TE+M_MOD2 ;Rx/Tx enable, 8N1\r | |
59 | db 0\r | |
60 | \r | |
61 | \r | |
62 | ;--------------------------------------------------------------\r | |
63 | \r | |
64 | as0ista:\r | |
65 | in0 a,(stat0)\r | |
66 | and M_RDRF\r | |
67 | ret z\r | |
68 | or 0ffh\r | |
69 | ret\r | |
70 | \r | |
71 | as1ista:\r | |
72 | in0 a,(stat1)\r | |
73 | and M_RDRF\r | |
74 | ret z\r | |
75 | or 0ffh\r | |
76 | ret\r | |
77 | \r | |
78 | \r | |
79 | as0inp:\r | |
80 | in0 a,(stat0)\r | |
81 | rlca\r | |
82 | jr nc,as0inp\r | |
83 | in0 a,rdr0\r | |
84 | ret\r | |
85 | \r | |
86 | as1inp:\r | |
87 | in0 a,(stat1)\r | |
88 | rlca\r | |
89 | jr nc,as1inp\r | |
90 | in0 a,rdr1\r | |
91 | ret\r | |
92 | \r | |
93 | \r | |
94 | \r | |
95 | as0osta:\r | |
96 | in0 a,(stat0)\r | |
97 | and M_TDRE\r | |
98 | ret z\r | |
99 | or 0ffh\r | |
100 | ret\r | |
101 | \r | |
102 | as1osta:\r | |
103 | in0 a,(stat1)\r | |
104 | and M_TDRE\r | |
105 | ret z\r | |
106 | or 0ffh\r | |
107 | ret\r | |
108 | \r | |
109 | \r | |
110 | as0out:\r | |
111 | in0 a,(stat0)\r | |
112 | and M_TDRE\r | |
113 | jr z,as0out\r | |
114 | out0 (tdr0),c\r | |
115 | ld a,c\r | |
116 | ret\r | |
117 | \r | |
118 | as1out:\r | |
119 | in0 a,(stat1)\r | |
120 | and M_TDRE\r | |
121 | jr z,as1out\r | |
122 | out0 (tdr1),c\r | |
123 | ld a,c\r | |
124 | ret\r | |
125 | \r | |
126 | end\r |